Breadcrumb Home > Dictionary > Index A azo group: Meaning and Definition of Find definitions for: az'o group" Pronunciation: [key] — Chem. Chem. the bivalent group −N=N− united to two aromatic groups, as in azobenzene. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Azof azoic ✖ Related Content Daily Word Quiz: unctuous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language